Abstract
The purpose of this article is to clarify the necessary ethical considerations when nonpharmaceutical interventions (NPI) such as isolation and quarantine are executed to prevent the spread of infectious diseases. A key issue is that preventing the spread of infectious diseases invariably limits individual rights such as freedom of movement and protection of privacy. In such cases, it is almost impossible to sacrifice individual liberties to protect people's health. Similarly, it is difficult to balance individual rights with common/public good. Therefore, ceaselessly seeking such a balance, for example, talking with individuals who are exposed to NPI and holding public discussions about whether a public health measure is appropriate, is an essential ethical consideration.
